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$[\begin{array}{c} x & 0.4 & 0.3 \end{array}]$

Bước 1

Multiply each element of $R_{1}$ by $\frac{1}{x}$ to make the entry at $1, 1$ a $1$ .

$[\begin{array}{c} \frac{x}{x} & \frac{0.4}{x} & \frac{0.3}{x} \end{array}]$

Bước 2

Rút gọn $R_{1}$ .

$[\begin{array}{c} 1 & \frac{0.4}{x} & \frac{0.3}{x} \end{array}]$